Attachment for tapping machines



Al BARBER. A ATTACHMENT FOR TAPPING MACHINES.

APPIICATION FILED MAY 17, 1920.

Patented Aug. 15, 19122.l

3 SHEETS--SHEET l.

A. J'. BARBER.

ATTACHMENT Foa TAPPTNG MACHINES.

APPI ICATION FILED MAY I7, |920. I

Patented Aug. 15, 1922.

A. J. BARBER. ATTACHMENT FORTAPPING. MACHINES.

' APHICATION FILED MAY 17. 1920. Y 1,426,273. Patented Aug- 15,1922.

3 SHEETS-SHEET 3.

table so as to present the bottom end of the i Se g lALBERT J. BARBER, OF STEU'BENVILLE, OHIO, ASSIGNOB, TO THE PIPE MACHINERY COMPANY, OF CLEVELAND, OHIO, ACORPORATON 0F OHIO.

ATTACHMENT FOR TAPPING IAGI-IINES.

Specification of Letters Patent. Patentd Aug, 1 5, 1922 Application filed May 17, 1920. Serial No. 381,927.

lTo all 'whom t may concern.'

Be it known that I, ALBERT J. BARBER, a citizen of .the United States, resident of Steubenville, county of Jefferson, and State of Chio, have invented newand useful lmprovements in Attachments for rltapping Machines, of w'hichthe following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

My invention relates to tapping machines, drilling` machines, lathes and the like, and particularly to attachments for holding pipe couplings while the same are being threaded. The invention particularly relates to mechanism of this character by means of which the yoke and gripper jaws can be flipped or turned over while supported in the pan or coupling to the tap, after the top -end thereof has been properly threaded. Other improvements in apparatus of this character contemplated by the invention will appear in detail in the accompanying drawings and be hereinafter specifically described and claimed.

The annexed drawings and the following description set forth in detail certain means embodying my invention, the disclosed means, however, constituting but one of the 'various mechanical forms in which theprinciple of the invention may be applied.

In said annexed drawings:

Figure l represents a front elevationof one unit of a machine to which a. pair of my improved attachments have vbeen applied, showing a single pan and a pair 'of spindles;

Figure 2 represents a fragmentary plan view of the invention, upon an enlarged scale` and taken in `the plane ,indicated by the line II-H, Figure l, showing-the attachment ready for turning to present the bottom end of the coupling to the tap;

Figure 3 represents a. view similar to lthat of Figure 2, but showing` the attachment in position for tapping;

Figure 4f represents a fragmentary front elevation, upon 'the scale used in Figure 2;

Figure 5 represents a longitudinal vertical section taken kin the planeindicated by the line V--V, Figure 3;

F igure'6 represents a vertical vtransverse section taken in the planeindicated by the line 'VI-VI, Figure 3 ;l

Figure 7 represents a vertical transverse section taken in the plane indicated by the line VII-VII, Figure 2;

Figure 8 represents a view similar' to Figure 7, but showing the coupling, yoke and gripping blocks vbeing'turned; and Figure 9 represents a vertical longitudinal section taken in the plane indicated by the line IX IX, Figure 2. f

Referring to the annexed drawings, there is indicated by the ordinal '1, a single tpan or. table of one unit of a tapping machine,

the same forming a ksupport for my improved attachment. Upon this table l is mounted a yoke 2" having a series of-spaced outwardly extending tooth-like lmembers 4l upon each side, adapted to register with a series of similar .inwardly lextending members 3 formed 4upon the table l. VIn amanner hereinafter fully described, the yoke 2 may be moved longitudinally of the table l so asto cause the members 3 and 4 either to` lie one above the other, whereby theyoke 2 can rest upon the table l, or-to be relatively staggered, so as to enable ytheteeth l to pass the-teeth 3, during-a flipping or turning` over of the yoke 2, effected in a manner hereinafter fully described. The yoke 2 is a support for gripper-blocksv 5 and 6 adapted to receive rand `clamp bet'ween them thewvor'k` 18 during the tapping operation. Steel pieces 7 vand 8 are linset in the blocks 5 and 6,and against them coupling 18 is clamped. vThe aforementioned turning of the yoke 2, blocks 5 and G, andv coupling 18 is effected upon two supporting trunnions 9 and l0. The'formerl of these trunnions is projected forwardly from r'the rear of the table l through a supporting bearing l and tapped into the-yoke2, and the latter is projected rearwardly of and through the table 1, supported within a front bearing 1, and secured within the gripper block 6 by means oi." the jaw 11 and screws 12. ln assembling the blocks and 6 upon the yoke 2, the same are .first mzn4 chined up, then iitted and dropped in, the yoke 2 having bottom inwardly extending shoulders 1.7 adapted to register with corresponding recesses 16 formed in the blocks 5 and 6, whereby the said blocks are reg tered and supported until suitable keys 15 can be driven into suitable slots lll and formed in said yoke, and gripper blocks, respectively. This `construction is ver plainly shown in Figures 2, 6 and 7. The gripper block 6 is movable relatively to the block 5, in order that the work 18 may be inserted between the jaws ot said blocks,

and this relative movement is effected by means oit a nut 31 mounted in the forward end or the yoke 2 and adapted to receive and co-operate with an exterior threaded portion of the supporting trunnion 10, the latter having a hand wheel 82 mounted upon its forward end to eiiect its rotation and consequently the longitudinal movement oit the block 6.

T he attachment assembled as hereinbetoro described, and holding the work 18, is adapted to cooperate with the well known collapsible tap 19 mounted upon a spindle 2O to which is secured a gear 21 adapted to mes with a. wide faced pinion 22 secured to a shaft 22', to which in turn is secured a bevel gear 23 co-operating with a bevel pinion mounted upon a sha-lit 25 driven from any suitable source of power, not shown. The collapsible tap 19 is raised above the work 18 by means of the pivoted lever 2G suitably Supported upon the tapping machine proper. The elements entering' into these details ot' the operation torni one unit ot the complete machine, are well known to those skilled in the art, are of standard construction andi adequately shown 'for the purpose, in lliglllr l.

lhile the work 18 is being mounted in the attachment, .it is desired to provide means whereby it will not be necessary to hold the weight thereof while tightening up the apparatus. l: effect this result by means ot a stop orv support Q3? provided with a. bearing portion proper 28, plainly shown in Figure 6, said support 27 being pinned to a shaft 9.9 mounted in the table 1 and provided with an operating handle 80, whereby the member 27 can be removed from the flipping area ot the yoke, gdpper blocks and work, when it is desired to reverse the work in the manner now to be described in detail. Before this flipping or turning over ot the attachment can take place, it is necessary to stagger the tooth-like members 8 and l so that they may pass each other. rlhis el'fected in the 'tollowing manner: Pivoted to the forward end of the table 1 is a link 88, to the outer end of which is pivoted a handle having an upwardly curved portion Se@ and secured there to a-djacently said portion 34 a downwardly curved strap portion 35, Figures le and 5. Mounted upon a section lO ot the supporting trunnion 10 between two hub members 102 is a` yoke 3G having outer bead-like ineinbers 37 journaled in suitable holes formed in the strap 35 and the portion Sil ol the handle Set. lt is evident that the actuation ot the handle Sel lrom the position shown in Figure 3 to that shown in Figure 2 will ef- 'feet the movement ot the trunnion 10 and the handle 82 and consequently ot the yoke 2 and the teeth a to the position shown in Figure 2. lt is further evident that then the rotation of the handle 82 will effect the turning of the yoke, grip 3er blocks and work, whereby the other end oi' the coupline can be tapped, when the yoke has been locked again. rllhis is effected by actuating the handle 231i to bring the several parte into the position shown in l*l igure 3, the rearward end ot the yoke 2 strikingi; and stopping against the face 88 oit the table 1. ln order that tho edges ot the tooth-like members 8 and 4t may not interiore, when the members 4l are .moved relatively to vthe members 8, the corners 89 are beveled, as plainly shown in Figure 9, in which figure the membes are moved in the direction indicated by the arrow when the same are moved to tapping position. ln order that the forward edges ot the teeth t may not interfere with the table 1, when the attachment is rotated, said teeth are beveled, as plainly indicated in Figure 8, by 'the ordinal 40.

1n addition to the detail improvements hereinbetore described, hereinafter claimed, and shown in the accompanying drawings, the invention provides means 'for' rotating the work and its support in the table, when it is desired to tap the other end oit the coupling, instead oit remo ving this usually .heavy apparatus from the table by l and, turning it, and replacing it in the table.

l/Vhat 1 claim is:

1. ln attachments :tor tapping` machines and the like, the combination oli a table; a yoke rotatably mounted therein, said table and yoke being formed respectively with co-operative members adapted to secure the yoke in the table; means for moving said yoke so that said members maybe free one from the other; means for effecting the rotation of the yoke; and gripper blocks mounted in the yoke.

2. ln attachments for tapping machines and the like, the combination ot a table; a yoke rotatably mounted therein, said table and yoke being` formed respectively with inwardly and outwardly extended members of engagement; means for effecting the ro tation of the yoke; and gripper `blocks mounted 1n the yoke. A I

3. In attachments for tapping machines and the like, the combination of a table; a

yoke movable longitudinally thereof, said yoke being formed with shoulders along its inner lower edges; means for moving said yoke; and gripper blocks formed with recesses co-operating with said shoulders to support the blocks.

4. 1n attachments for tapping machines and the like, the combination of a table; relatively movable gripper blocks mounted thereon; a stop or support forV the work; and means for moving said support into and out of operative position beneath the work.

5. In attachments for tapping machines and the like, the combination of a table; a yoke movable longitudinally thereof; means for moving said yoke; a pair of relatively movable gripper blocks mounted on said yoke; means for so moving said blocks; and a stop or support for the work pivctally mounted upon said table and adapted to be svmng in under said blocks.

6. In attachments for tapping machines and the like, the combination of a table; a yoke mounted therein and movable relatively thereto, two series of co-operating tooth-like members formed respectively' upon said table and yoke, said members being arranged in staggered relation so that they can pass each other in a vertical plane,

in one position of said yoke, and arranged to bear against each other to support the yoke, in another position of the latter; a pair of trunnions; a pair of gripper blocks secured in the yoke; means for moving the yoke; and means for rotating the yoke and blocks upon said trunnions.

'7. In attachments for tapping machines and the like, the combination of a table; a yoke longitudinally movable thereof; means for effecting such movements; two series of inwardly and outwardly extended blocks formed upon said table and yoke, respectively, a-nd adapted, in one position of said yoke, to be positioned one series above the other to support said yoke and, in` another position of the latter, to bepositioned so that one series can pass the other in a ver tica-l plane; relatively movable gripper blocks mounted in said yoke; means for so relatively moving said blocks; trunnions mounted in said table, `said yoke being secured to said trunnions; and means for turning said trunnions.

8. In attachments for tapping machines and the like, the combination of a table; a yoke longitudinally movable thereof; means for effectingsuch;` movements; two series vof .inwardlyand. .outwardly :extended blocks formed yupon :said table andy yoke, respect tively, and adapted,iin one position of said oke to -be ositionedone seriesy above .the

other to support said yoke, and, in another Vposition of the latter, V:to .be positioned `that: one Aseries can passthe other in a vertical plane; a pair of relatively movable gripper blocks; means for so relatively moving said blocks; means securing said blocks to said yoke; a pair oftrunnions mounted in said table, said yoke and one of said blocks being secured vto said trunnions, respectively; and means for turning said trunand yoke, respectively, and adapted, in one.

position of said yoke, to be positioned one series above the other to support said yoke and, in another position of the latter, to be vpositioned so that one series can pass the other in a vertical plane; a pair of relav tively movable gripper blocks; means for so relatively moving said blocks, the yoke having inwardly extending shoulders, and the blocks having co-operating recesses upon their outer fa'ces to support the blocks; and trunnions mounted in saidltable, said yoke being' secured to said trunnions, the means for effecting the relative movements ofsaid gripper blocks being adapted to turn said trunnions. i i

l0. In attachments for tapping machines and the like, the combination of a table; a yoke supported thereon; relatively movable gripper blocks mounted upon said yoke;

`ioa l,

means securing said blocks to said yoke; a

trunnion secured to one of said gripper blocks and having an externally threaded portion; a nut secured in said yoke and adapted to receive and cooperate with said trunnion; means for turning said trunnion; a second trunnion mounted in said table and secured to said yoke; means for releasing said yoke from its table support; and means secured to said first-mentioned trunnion for actuating said yoke-releasing means.

il. In attachments for tapping machines and the like, the combinationof a table; a yoke longitudinally movable thereof; two series of inwardly and outwardly extended blocks formed upon said table and yoke, respectively, and adapted, in one position -of said yoke, to be positioned one series` above the otherv to support saidyoke, and,

in a Vertical plane; e pair of relatively Inovable gripper blocks; means Securing said blocks to said yoke; a trunnon secured to one of said gripper blocks and having an eX- teinally threaded portion; a nut secuiecl in,

said yoke and adapted to receive and eoopeiete with said trunnion; means for turning said trunnlon; a second trunnion mounted in said table and secured to said yoke; and an operating lever pivoted at one end l0 upon said table and pivoted inteiinecliately its ends to Said firstanentionecl trunnion.

Signed by me, this 13th clay of March, 1920.

ALBERT J. BARBER. 

